US20130131953A1 - Anti-Sticking And Diagnostic Strategy For Exhaust System Valves - Google Patents
Anti-Sticking And Diagnostic Strategy For Exhaust System Valves Download PDFInfo
- Publication number
- US20130131953A1 US20130131953A1 US13/300,941 US201113300941A US2013131953A1 US 20130131953 A1 US20130131953 A1 US 20130131953A1 US 201113300941 A US201113300941 A US 201113300941A US 2013131953 A1 US2013131953 A1 US 2013131953A1
- Authority
- US
- United States
- Prior art keywords
- wastegate
- electronically controlled
- engine
- valve
- diagnostic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/16—Other safety measures for, or other control of, pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/001—Engines characterised by provision of pumps driven at least for part of the time by exhaust using exhaust drives arranged in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/007—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in parallel, e.g. at least one pump supplying alternatively
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present disclosure relates generally to engine systems with electronically controlled valves located in the exhaust system, and more particularly to proactive diagnostics to detect and avoid stuck closed valve fault conditions.
- Today's engine systems are often equipped with one or more turbochargers, an exhaust gas circulation system and electronically controlled valves in the exhaust system to control compressor bypass pathways, turbine bypass pathways, mass flow rate of exhaust gas recirculated and other known control features.
- An exhaust pathway that avoids the turbine is often controlled by what is termed in the art as a wastegate valve.
- the wastegate valve may be opened to channel exhaust directly from the exhaust manifold toward the tailpipe, without imparting energy to the turbocharger. Due to varying temperatures and the constituents in the engine exhaust, these valves can accumulate a build-up of hydrocarbons, soot and other compounds that inhibit proper operation to the extent that the valve can sometimes be stuck closed.
- U.S. Patent Publication 2009/0164106 teaches opening and closing an EGR valve when the engine ignition is on but the engine is not running in order to inhibit sticking after the engine begins operation. While maybe not true for all valves, such as valves controlling exhaust gas recirculation, a stuck closed wastegate valve can potentially lead to catastrophic turbocharger or engine failure.
- the present disclosure is directed toward one or more of the problems set forth above.
- an engine system includes an exhaust system fluidly connected to an electronically controlled engine.
- the exhaust system has a first pathway through a turbine of a turbocharger, and a second pathway that bypasses the turbine.
- An electronically controlled wastegate valve is biased to close the second pathway.
- At least one electronic controller is in communication with the electronically controlled engine and the electronically controlled wastegate valve.
- the electronic controller is configured to execute a wastegate diagnostic algorithm to detect a stuck closed fault condition of the electronically controlled wastegate valve, and derate the electronically controlled engine in response to detection of a stuck closed fault condition of the electronically controlled wastegate valve.
- a method of operating an engine system includes detecting a stuck closed fault condition of an electronically controlled wastegate valve.
- the electronically controlled engine is derated responsive to detection of the stuck closed fault condition of the electronically controlled wastegate valve.
- FIG. 1 is a schematic view of an engine system according to one aspect of the present disclosure.
- FIG. 2 is a software flow diagram for carrying out the logic of detecting and logging a stuck closed valve condition according to the present disclosure.
- Engine system 10 includes an electronically controlled engine 11 that is fluidly connected to an exhaust system 12 .
- engine 11 is a sixteen cylinder large bore compression ignition engine whose operation is controlled by an electronic controller 13 .
- One aspect of engine control being operation of electronically controlled fuel injectors (not shown) associated with each of the individual large bore cylinders 19 , which may have a bore size in excess of 140 millimeters each.
- electronically controlled engine 11 has a V configuration with two separate banks of eight engine cylinders.
- Engine 11 has a first exhaust manifold 31 and a second exhaust manifold 32 that can be considered portions of exhaust system 12 that terminates at a tailpipe 35 .
- a balance tube 33 may fluidly connect the two exhaust manifolds 31 and 32 .
- Engine system 10 may include a pair of turbochargers 15 a and 15 b that are associated with the respective exhaust manifolds 31 and 32 .
- exhaust from manifold 31 passes through a turbine 16 a of turbocharger 15 a before being channeled in a turbine exhaust 28 a through an aftertreatment system, which may include a diesel particulate filter 34 , before arriving at tailpipe 35 .
- exhaust from second manifold 32 and maybe additional exhaust from manifold 31 through balance tube 33 , passes through a turbine 16 b of turbocharger 15 b before being channeled to an exhaust aftertreatment system by turbine exhaust 28 b .
- Turbochargers 15 a and 15 b also include compressors 17 a and 17 b that receive incoming ambient air 50 a and 50 b and pressurize the same before channeling the compressed air to aftercooler 44 .
- Output air from the aftercooler 44 may be mixed with recirculated exhaust gas at mixers 43 a and 43 b before being channeled to respective intake manifolds 45 a and 45 b .
- exhaust gas recirculation is provided by seven cylinders in the exhaust manifold 32 , and the rate of exhaust gas circulation is partially controlled by an exhaust restriction valve 48 in a known manner.
- the recirculated exhaust gas may be cooled at coolers 41 before passing through an EGR cold valve 42 on the way to mixers 43 a and 43 b.
- electronic controller 13 is also in control communication with an electronically controlled wastegate valve 30 and an electronically controlled compress bypass valve 55 .
- Electronically controlled wastegate valve 30 may be biased to a closed position but open in response to an open signal transmitted from electronic controller 13 .
- electronically controlled wastegate valve 30 is normally biased closed, but may be opened by any suitable actuator, including but not limited to electrical actuators, pneumatic actuators, and hydraulic actuators.
- exhaust travels a first pathway 20 through turbine 16 .
- wastegate valve 30 When wastegate valve 30 is open, exhaust travels a second pathway 22 directly from balance tube 33 to the exhaust aftertreatment system that is represented by diesel particulate filter 34 .
- wastegate valve 30 might be opened to avoid a turbine overspeed condition, to reduce boost pressure or any other reason known in the art.
- Electronically controlled wastegate valve 30 may utilize any known actuator to move from a closed position to an open position, and any known sensor for communicating valve condition to electronic controller 13 in a known manner.
- the valve condition sensor may be as simple as one bit of information relating to open or closed, or may have any desired granularity to also detect partially opened valve conditions without departing from the present disclosure. All versions of the present disclosure include one or more electronically controlled wastegate valves that allow exhaust to be channeled through a second pathway 22 that avoids a turbocharger(s) 15 .
- the present disclosure contemplates an engine system with any number of turbochargers with or without exhaust gas recirculation and any number of electronically controlled wastegate and/or bypass valves that permit the exhaust or air to bypass one or more of the turbochargers and/or engine, respectively.
- the compress bypass valve 55 allows the electronic controller 13 to directly fluidly connect aftercooler 44 to balance tube 33 via a bypass passageway 47 .
- air from aftercooler 44 may be directed along a first pathway 56 through compressor 17 , through aftercooler 44 and into engine 11 via a respective intake manifold 45 .
- a second pathway 57 fluidly connects aftercooler 44 directly to balance tube 33 to bypass engine 11 .
- compress bypass valve 55 is normally closed, and thus is also exposed to hydrocarbon build up on the downstream side of the valve where it connects to balance tube 33 .
- Electronically controlled compress bypass valve 55 may include any suitable actuator for opening the valve from a normally closed position to an open position, and may include a valve condition sensor that communicates the valve position to electronic controller 13 with any desired level of granularity, ranging from a simple open or closed indicator to a sensor that actually senses a continuum of different valve positions.
- a flow diagram illustrates a small fraction of the software executed by electronic controller 13 when engine system 10 is in operation.
- the engine system 10 is operated as rated at box 81 .
- engine system 10 has its full rated maximum power available.
- Electronic controller 13 may be configured to execute a diagnostic opportunity detection algorithm 70 by executing a query 82 to determine whether a diagnostic opportunity is available.
- a diagnostic opportunity means that the engine is operating in a condition where the exhaust valve (e.g., wastegate valve 30 or compress bypass valve 55 ) is normally closed, and there is no need for boost pressure or opening the exhaust valve will not significantly degrade from a desired boost level.
- a diagnostic opportunity could be during low idle conditions when there is no need for boost.
- Another diagnostic opportunity according to the present disclosure could be when electronic controller is commanding zero fueling, such as when a machine equipped with engine system 10 is coasting downhill.
- Another diagnostic opportunity might be when electronic controller 13 requests a large deceleration of engine 11 , such as a deceleration change of maybe 500 RPM.
- the open signal may be transmitted to the exhaust valve 33 , 55 while the engine is decelerating, and may actually assist in the deceleration.
- Other less desirable diagnostic opportunities might occur during low boost levels combined with low fueling levels such that opening one or both of the exhaust valve 33 and 55 will not significantly degrade from a desired boost level.
- diagnostic opportunity query 82 is only executed when engine system 10 is running, the valve to be diagnosed is in its normally closed position and the other opportunity conditions discussed above are met. If query 82 returns a negative, the software will loop back and continue to operate engine system 10 in a rated condition. If the diagnostic opportunity query returns a yes, electronic controller 13 will execute a valve diagnostic algorithm 75 with respect to each exhaust valve. For instance, electronic controller may execute valve diagnostic algorithm 75 for each of the exhaust valves in question in series, or in parallel without departing from the present disclosure. At box 83 , an open signal is communicated from electronic controller 13 to the valve in question, such as wastegate valve 30 or compress bypass valve 55 .
- electronic controller 13 reads the valve condition sensor and determines whether the valve is indeed open. If the query 84 returns yes, the open signal to the valve is discontinued at box 88 , and at box 89 the software loops back to continue engine operation as rated at box 81 . If the valve opening query 84 returns a no, electronic controller 13 logs a stuck closed valve fault in memory at box 86 , the open signal is discontinued and the engine is derated. At box 87 , the engine is operated as derated and the logic flow diagram ends at box 90 .
- the term derated means that engine system 10 is allowed to operate at any condition that does not require the valve in question to open, which typically is less than its rated maximum power, until the stuck closed valve condition is remedied.
- a derated engine according to the present disclosure means that engine system 10 operation will be prevented from entering a range where the electronic controller 13 would command the valve in question to open, which typically occurs at higher speed and load conditions for engine 11 .
- the engine may continue to operate at full power after a fault is detected, but will reduce available power when there is a need to open the valve in question to avoid engine and/or turbocharger damage.
- the valve diagnostic algorithm 75 may be executed sequentially for the electronically controlled wastegate valve 30 followed by the electronically controlled compress bypass valve 55 .
- Either valve being found in a stuck closed position can cause the engine to be derated until the valve stuck closed default condition is remedied in a known manner.
- the derated range of available operation of engine 11 may be different depending on which valve is stuck closed. In some instances, continued operation of the engine may relieve the stuck closed valve condition without any outside intervention. Otherwise, servicing by a technician may be necessary in order to remedy the stuck closed valve condition and reset the fault condition to return the engine to rated operation.
- the present disclosure finds potential application in any engine system (e.g. compression ignition, spark ignition, etc.) that includes one or more electronically controlled exhaust valves that are normally closed and may become stuck closed due to the build up of hydrocarbons, soot and other compounds in the exhaust.
- the present disclosure finds specific application in large bore compression ignition engines where opening of the exhaust valve may be necessary during certain engine operating conditions in order to avoid risks associated with catastrophic turbocharger or engine failure.
- the present disclosure finds potential application in any engine system that includes an exhaust valve that may become stuck closed and the engine system has any of a wide variety of system configurations that may or may not include exhaust gas recirculation, and may or may not include one or more turbochargers in series or parallel, etc.
- the exhaust valve in question is electrically controlled to move to an open position, and includes some sensor or other means (e.g. inferred from other sensors) for communicating the valve condition to the electronic controller for execution of the valve diagnostic algorithm according to the present disclosure.
- the present disclosure advantageously utilizes a valve diagnostic algorithm to detect a stuck closed valve condition before there is a need to open the valve in question. While this is important, the diagnostic activity may proactively inhibit sticking problems by exercising the valve to open when to do so would not undermine current engine operation conditions, such as significantly effecting boost pressure. Thus, depending upon the particular application, engineers may be more or less aggressive in deciding what constitutes a diagnostic opportunity according to the present disclosure. In those applications where build up may occur more rapidly and a stuck closed valve condition may be more likely to occur, the software might be implemented to look for as many diagnostic opportunities as possible to exercise the valve between open and closed positions more often than in instances where valve closed stuck conditions are extremely rare.
- one application might only choose to encode a diagnostic opportunity as corresponding to electronic controller 13 requesting a deceleration of engine 11 greater than some determined RPM, such as 500 RPM.
- the diagnostic opportunity algorithm may be encoded to execute the valve diagnostic algorithm in regular intervals during idle conditions, when a large engine deceleration is requested, when zero fueling is requested and look for other opportunities such as low boost and low fueling conditions to exercise the exhaust valves, especially if a counter has determined that the valves have been closed for some extended duration.
- the diagnostic opportunity algorithm may include programming to expand opportunities to low boost and low fueling conditions to help proactively ensure that the valve does not become stuck closed.
- valve diagnostic opportunity algorithm 70 provides enough opportunities to execute the valve diagnostic algorithm 75 , the valve should be regularly exercised so that hydrocarbon, soot and other compound build up never reaches a point where the valve becomes stuck closed and a fault condition is actually detected and acted upon to derate engine system 10 .
- the valve diagnostic algorithm 75 is acting upon wastegate valve 30 , that logic may be considered as a wastegate diagnostic algorithm according to the present disclosure.
- the algorithm may be characterized as a compress bypass valve diagnostic algorithm without departing from the present disclosure.
- valves that are biased toward a closed position
- present disclosure also contemplates systems in which the valves are biased to a partially or fully open position such that the valve must be actuated to be moved to a closed position.
- the actuator for the respective valve would be actuated to maintain the same closed until the controller determined that the valve was in need of being opened.
- communicating an open signal” to a valve that is biased to an open or partially opened position means discontinuing a signal that actuates the valve to a closed position.
- valves that need no actuation energy in order to open would also fall within the present disclosure.
Abstract
Description
- The present disclosure relates generally to engine systems with electronically controlled valves located in the exhaust system, and more particularly to proactive diagnostics to detect and avoid stuck closed valve fault conditions.
- Today's engine systems are often equipped with one or more turbochargers, an exhaust gas circulation system and electronically controlled valves in the exhaust system to control compressor bypass pathways, turbine bypass pathways, mass flow rate of exhaust gas recirculated and other known control features. An exhaust pathway that avoids the turbine is often controlled by what is termed in the art as a wastegate valve. For instance, when boost pressure approaches some predetermined maximum or there is a risk of turbine overspeed, the wastegate valve may be opened to channel exhaust directly from the exhaust manifold toward the tailpipe, without imparting energy to the turbocharger. Due to varying temperatures and the constituents in the engine exhaust, these valves can accumulate a build-up of hydrocarbons, soot and other compounds that inhibit proper operation to the extent that the valve can sometimes be stuck closed. In an effort to prevent valves located in the exhaust system from becoming stuck closed, the art recognizes various strategies for exercising the valve to inhibit sticking. For instance, U.S. Patent Publication 2009/0164106 teaches opening and closing an EGR valve when the engine ignition is on but the engine is not running in order to inhibit sticking after the engine begins operation. While maybe not true for all valves, such as valves controlling exhaust gas recirculation, a stuck closed wastegate valve can potentially lead to catastrophic turbocharger or engine failure.
- The present disclosure is directed toward one or more of the problems set forth above.
- In one aspect, an engine system includes an exhaust system fluidly connected to an electronically controlled engine. The exhaust system has a first pathway through a turbine of a turbocharger, and a second pathway that bypasses the turbine. An electronically controlled wastegate valve is biased to close the second pathway. At least one electronic controller is in communication with the electronically controlled engine and the electronically controlled wastegate valve. The electronic controller is configured to execute a wastegate diagnostic algorithm to detect a stuck closed fault condition of the electronically controlled wastegate valve, and derate the electronically controlled engine in response to detection of a stuck closed fault condition of the electronically controlled wastegate valve.
- In another aspect, a method of operating an engine system includes detecting a stuck closed fault condition of an electronically controlled wastegate valve. The electronically controlled engine is derated responsive to detection of the stuck closed fault condition of the electronically controlled wastegate valve.
-
FIG. 1 is a schematic view of an engine system according to one aspect of the present disclosure; and -
FIG. 2 is a software flow diagram for carrying out the logic of detecting and logging a stuck closed valve condition according to the present disclosure. - Referring to
FIG. 1 , oneexample engine system 10 according to the present disclosure is shown.Engine system 10 includes an electronically controlledengine 11 that is fluidly connected to anexhaust system 12. In the illustrated embodiment,engine 11 is a sixteen cylinder large bore compression ignition engine whose operation is controlled by anelectronic controller 13. One aspect of engine control being operation of electronically controlled fuel injectors (not shown) associated with each of the individuallarge bore cylinders 19, which may have a bore size in excess of 140 millimeters each. Also, in the illustrated embodiment, electronically controlledengine 11 has a V configuration with two separate banks of eight engine cylinders. Thus,Engine 11 has afirst exhaust manifold 31 and a second exhaust manifold 32 that can be considered portions ofexhaust system 12 that terminates at atailpipe 35. Although not required, abalance tube 33 may fluidly connect the twoexhaust manifolds 31 and 32. -
Engine system 10 may include a pair ofturbochargers respective exhaust manifolds 31 and 32. Thus, exhaust frommanifold 31 passes through aturbine 16 a ofturbocharger 15 a before being channeled in a turbine exhaust 28 a through an aftertreatment system, which may include adiesel particulate filter 34, before arriving attailpipe 35. Likewise, exhaust from second manifold 32, and maybe additional exhaust frommanifold 31 throughbalance tube 33, passes through aturbine 16 b ofturbocharger 15 b before being channeled to an exhaust aftertreatment system by turbine exhaust 28 b.Turbochargers compressors ambient air aftercooler 44. Output air from theaftercooler 44 may be mixed with recirculated exhaust gas atmixers respective intake manifolds coolers 41 before passing through an EGRcold valve 42 on the way to mixers 43 a and 43 b. - Apart from controlling
Engine 11,electronic controller 13 is also in control communication with an electronically controlledwastegate valve 30 and an electronically controlledcompress bypass valve 55. Electronically controlledwastegate valve 30 may be biased to a closed position but open in response to an open signal transmitted fromelectronic controller 13. Thus electronically controlledwastegate valve 30 is normally biased closed, but may be opened by any suitable actuator, including but not limited to electrical actuators, pneumatic actuators, and hydraulic actuators. When closed, exhaust travels afirst pathway 20 through turbine 16. Whenwastegate valve 30 is open, exhaust travels a second pathway 22 directly frombalance tube 33 to the exhaust aftertreatment system that is represented bydiesel particulate filter 34. For instance,wastegate valve 30 might be opened to avoid a turbine overspeed condition, to reduce boost pressure or any other reason known in the art. Because electronically controlledwastegate valve 30 is normally closed, and continuously exposed to hydrocarbon build-up, there is a risk that the build-up can cause the valve to be stuck in a closed position. Electronically controlledwastegate valve 30 may utilize any known actuator to move from a closed position to an open position, and any known sensor for communicating valve condition toelectronic controller 13 in a known manner. The valve condition sensor may be as simple as one bit of information relating to open or closed, or may have any desired granularity to also detect partially opened valve conditions without departing from the present disclosure. All versions of the present disclosure include one or more electronically controlled wastegate valves that allow exhaust to be channeled through a second pathway 22 that avoids a turbocharger(s) 15. Thus, the present disclosure contemplates an engine system with any number of turbochargers with or without exhaust gas recirculation and any number of electronically controlled wastegate and/or bypass valves that permit the exhaust or air to bypass one or more of the turbochargers and/or engine, respectively. - The
compress bypass valve 55 allows theelectronic controller 13 to directly fluidly connectaftercooler 44 to balancetube 33 via abypass passageway 47. Thus, air fromaftercooler 44 may be directed along afirst pathway 56 through compressor 17, throughaftercooler 44 and intoengine 11 via a respective intake manifold 45. When electronically controlledcompress bypass valve 55 is open, asecond pathway 57 fluidly connectsaftercooler 44 directly tobalance tube 33 tobypass engine 11. Likewastegate valve 30,compress bypass valve 55 is normally closed, and thus is also exposed to hydrocarbon build up on the downstream side of the valve where it connects tobalance tube 33. Electronically controlledcompress bypass valve 55 may include any suitable actuator for opening the valve from a normally closed position to an open position, and may include a valve condition sensor that communicates the valve position toelectronic controller 13 with any desired level of granularity, ranging from a simple open or closed indicator to a sensor that actually senses a continuum of different valve positions. - Referring to
FIG. 2 , a flow diagram illustrates a small fraction of the software executed byelectronic controller 13 whenengine system 10 is in operation. After startbox 80, theengine system 10 is operated as rated atbox 81. When operated in a rated condition,engine system 10 has its full rated maximum power available.Electronic controller 13 may be configured to execute a diagnosticopportunity detection algorithm 70 by executing a query 82 to determine whether a diagnostic opportunity is available. In general, according to the present disclosure a diagnostic opportunity means that the engine is operating in a condition where the exhaust valve (e.g.,wastegate valve 30 or compress bypass valve 55) is normally closed, and there is no need for boost pressure or opening the exhaust valve will not significantly degrade from a desired boost level. For instance, a diagnostic opportunity could be during low idle conditions when there is no need for boost. Another diagnostic opportunity according to the present disclosure could be when electronic controller is commanding zero fueling, such as when a machine equipped withengine system 10 is coasting downhill. Another diagnostic opportunity might be whenelectronic controller 13 requests a large deceleration ofengine 11, such as a deceleration change of maybe 500 RPM. In such a case, the open signal may be transmitted to theexhaust valve exhaust valve engine system 10 is running, the valve to be diagnosed is in its normally closed position and the other opportunity conditions discussed above are met. If query 82 returns a negative, the software will loop back and continue to operateengine system 10 in a rated condition. If the diagnostic opportunity query returns a yes,electronic controller 13 will execute a valvediagnostic algorithm 75 with respect to each exhaust valve. For instance, electronic controller may execute valvediagnostic algorithm 75 for each of the exhaust valves in question in series, or in parallel without departing from the present disclosure. Atbox 83, an open signal is communicated fromelectronic controller 13 to the valve in question, such aswastegate valve 30 or compressbypass valve 55. Atquery 84,electronic controller 13 reads the valve condition sensor and determines whether the valve is indeed open. If thequery 84 returns yes, the open signal to the valve is discontinued atbox 88, and atbox 89 the software loops back to continue engine operation as rated atbox 81. If thevalve opening query 84 returns a no,electronic controller 13 logs a stuck closed valve fault in memory at box 86, the open signal is discontinued and the engine is derated. Atbox 87, the engine is operated as derated and the logic flow diagram ends atbox 90. As used in the present disclosure, the term derated means thatengine system 10 is allowed to operate at any condition that does not require the valve in question to open, which typically is less than its rated maximum power, until the stuck closed valve condition is remedied. In other words a derated engine according to the present disclosure means thatengine system 10 operation will be prevented from entering a range where theelectronic controller 13 would command the valve in question to open, which typically occurs at higher speed and load conditions forengine 11. Thus, the engine may continue to operate at full power after a fault is detected, but will reduce available power when there is a need to open the valve in question to avoid engine and/or turbocharger damage. When implemented, the valvediagnostic algorithm 75 may be executed sequentially for the electronically controlledwastegate valve 30 followed by the electronically controlledcompress bypass valve 55. Either valve being found in a stuck closed position can cause the engine to be derated until the valve stuck closed default condition is remedied in a known manner. However, the derated range of available operation ofengine 11 may be different depending on which valve is stuck closed. In some instances, continued operation of the engine may relieve the stuck closed valve condition without any outside intervention. Otherwise, servicing by a technician may be necessary in order to remedy the stuck closed valve condition and reset the fault condition to return the engine to rated operation. - The present disclosure finds potential application in any engine system (e.g. compression ignition, spark ignition, etc.) that includes one or more electronically controlled exhaust valves that are normally closed and may become stuck closed due to the build up of hydrocarbons, soot and other compounds in the exhaust. The present disclosure finds specific application in large bore compression ignition engines where opening of the exhaust valve may be necessary during certain engine operating conditions in order to avoid risks associated with catastrophic turbocharger or engine failure. The present disclosure finds potential application in any engine system that includes an exhaust valve that may become stuck closed and the engine system has any of a wide variety of system configurations that may or may not include exhaust gas recirculation, and may or may not include one or more turbochargers in series or parallel, etc. In all versions of the present disclosure the exhaust valve in question is electrically controlled to move to an open position, and includes some sensor or other means (e.g. inferred from other sensors) for communicating the valve condition to the electronic controller for execution of the valve diagnostic algorithm according to the present disclosure.
- The present disclosure advantageously utilizes a valve diagnostic algorithm to detect a stuck closed valve condition before there is a need to open the valve in question. While this is important, the diagnostic activity may proactively inhibit sticking problems by exercising the valve to open when to do so would not undermine current engine operation conditions, such as significantly effecting boost pressure. Thus, depending upon the particular application, engineers may be more or less aggressive in deciding what constitutes a diagnostic opportunity according to the present disclosure. In those applications where build up may occur more rapidly and a stuck closed valve condition may be more likely to occur, the software might be implemented to look for as many diagnostic opportunities as possible to exercise the valve between open and closed positions more often than in instances where valve closed stuck conditions are extremely rare. For instance, one application might only choose to encode a diagnostic opportunity as corresponding to
electronic controller 13 requesting a deceleration ofengine 11 greater than some determined RPM, such as 500 RPM. In other instances, the diagnostic opportunity algorithm may be encoded to execute the valve diagnostic algorithm in regular intervals during idle conditions, when a large engine deceleration is requested, when zero fueling is requested and look for other opportunities such as low boost and low fueling conditions to exercise the exhaust valves, especially if a counter has determined that the valves have been closed for some extended duration. For instance, ifelectronic controller 13 is programmed to keep track of time past since the last time the respective exhaust valve was open, the diagnostic opportunity algorithm may include programming to expand opportunities to low boost and low fueling conditions to help proactively ensure that the valve does not become stuck closed. Thus, during normal operation, if thediagnostic opportunity algorithm 70 provides enough opportunities to execute the valvediagnostic algorithm 75, the valve should be regularly exercised so that hydrocarbon, soot and other compound build up never reaches a point where the valve becomes stuck closed and a fault condition is actually detected and acted upon to derateengine system 10. When the valvediagnostic algorithm 75 is acting uponwastegate valve 30, that logic may be considered as a wastegate diagnostic algorithm according to the present disclosure. In addition, when the valvediagnostic algorithm 75 is acting upon thecompress bypass valve 55, the algorithm may be characterized as a compress bypass valve diagnostic algorithm without departing from the present disclosure. - Although the present disclosure has been illustrated in the context of valves that are biased toward a closed position, the present disclosure also contemplates systems in which the valves are biased to a partially or fully open position such that the valve must be actuated to be moved to a closed position. In such a case, during normal operation when the valve is normally closed, the actuator for the respective valve would be actuated to maintain the same closed until the controller determined that the valve was in need of being opened. As used in the present disclosure, “communicating an open signal” to a valve that is biased to an open or partially opened position means discontinuing a signal that actuates the valve to a closed position. Likewise, the phrase “discontinuing an open signal” to a valve that is biased to an open or partially open position means communicating a signal to the valve actuator to cause the valve to close. Thus, valves that need no actuation energy in order to open would also fall within the present disclosure.
- It should be understood that the above description is intended for illustrative purposes only, and is not intended to limit the scope of the present disclosure in any way. Thus, those skilled in the art will appreciate that other aspects of the disclosure can be obtained from a study of the drawings, the disclosure and the appended claims.
Claims (20)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/300,941 US8849548B2 (en) | 2011-11-21 | 2011-11-21 | Anti-sticking and diagnostic strategy for exhaust system valves |
DE112012004837.7T DE112012004837T5 (en) | 2011-11-21 | 2012-11-15 | Strategy for avoiding the sticking and diagnostics of exhaust system valves |
PCT/US2012/065243 WO2013078061A1 (en) | 2011-11-21 | 2012-11-15 | Anti-sticking and diagnostic strategy for exhaust system valves |
CN201280057164.7A CN103946513B (en) | 2011-11-21 | 2012-11-15 | Engine system and the method for running engine system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/300,941 US8849548B2 (en) | 2011-11-21 | 2011-11-21 | Anti-sticking and diagnostic strategy for exhaust system valves |
Publications (2)
Publication Number | Publication Date |
---|---|
US20130131953A1 true US20130131953A1 (en) | 2013-05-23 |
US8849548B2 US8849548B2 (en) | 2014-09-30 |
Family
ID=48427719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/300,941 Active 2032-10-12 US8849548B2 (en) | 2011-11-21 | 2011-11-21 | Anti-sticking and diagnostic strategy for exhaust system valves |
Country Status (4)
Country | Link |
---|---|
US (1) | US8849548B2 (en) |
CN (1) | CN103946513B (en) |
DE (1) | DE112012004837T5 (en) |
WO (1) | WO2013078061A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130211693A1 (en) * | 2012-02-15 | 2013-08-15 | Ford Global Technologies, Llc | Method for operating an internal combustion engine with a turbocharger arrangement and control unit for an engine with a turbocharger arrangement |
US20150159545A1 (en) * | 2013-12-05 | 2015-06-11 | GM Global Technology Operations LLC | Turbocharger compressor temperature control systems and methods |
US20150159544A1 (en) * | 2013-12-05 | 2015-06-11 | GM Global Technology Operations LLC | Turbo speed control for mode transitions in a dual turbo system |
US20160090926A1 (en) * | 2014-09-30 | 2016-03-31 | Toyota Jidosha Kabushiki Kaisha | Supercharging system |
US9546591B2 (en) | 2014-11-26 | 2017-01-17 | Caterpillar Inc. | Exhaust system with exhaust gas recirculation and multiple turbochargers, and method for operating same |
DE102015105296B4 (en) | 2014-04-24 | 2018-05-09 | Toyota Jidosha Kabushiki Kaisha | Control device for an internal combustion engine |
CN111911303A (en) * | 2019-05-07 | 2020-11-10 | 丰田自动车株式会社 | Vehicle with a steering wheel |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9869239B2 (en) * | 2012-08-23 | 2018-01-16 | Toyota Jidosha Kabushiki Kaisha | Wastegate valve control device |
US9528430B2 (en) * | 2014-12-10 | 2016-12-27 | Ford Global Technologies, Llc | Methods and system for compensating compressor recirculation sludge |
US9631564B2 (en) * | 2014-12-10 | 2017-04-25 | Ford Global Technologies, Llc | Methods and system for determining compressor recirculation valve sludge |
DE102015002598A1 (en) * | 2015-02-28 | 2016-09-01 | Man Truck & Bus Ag | Method and device for controlling a drive system of a motor vehicle with a supercharged internal combustion engine |
US10618380B2 (en) | 2017-08-01 | 2020-04-14 | Ford Global Technologies, Llc | Method and system for coolant temperature sensor diagnostics |
US10746089B2 (en) * | 2018-01-25 | 2020-08-18 | Caterpillar Inc. | Inline turbocharger arrangement and method |
KR102024738B1 (en) * | 2018-11-19 | 2019-09-24 | 콘티넨탈 오토모티브 시스템 주식회사 | Apparatus and method for diagnosing failure of bypass valve |
US10823092B2 (en) | 2019-01-24 | 2020-11-03 | Ford Global Technologies, Llc | System and method for waste-gate valve diagnostics |
CN109882283B (en) * | 2019-03-27 | 2020-09-29 | 潍柴动力股份有限公司 | Control method and device for sequential pressurization system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7500363B2 (en) * | 2006-07-25 | 2009-03-10 | Honda Motor Co., Ltd. | Failure detecting device for supercharging-pressure control means in supercharging device of engine |
US7593828B2 (en) * | 2007-08-16 | 2009-09-22 | Gm Global Technology Operations, Inc. | Method and apparatus for monitoring a variable geometry intake air compressor device |
US20120210710A1 (en) * | 2011-02-21 | 2012-08-23 | Ford Global Technologies, Llc | Method for operating a turbocharger arrangement and control unit for a turbocharger arrangement |
US8347625B2 (en) * | 2009-07-30 | 2013-01-08 | Robert Bosch Gmbh | Method and device for operating a wastegate actuator for a wastegate |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5762954A (en) | 1980-09-30 | 1982-04-16 | Aisin Seiki Co Ltd | Egr control valve apparatus and its control method |
JP2002070655A (en) | 2000-08-31 | 2002-03-08 | Calsonic Kansei Corp | Vehicular exhaust gas recirculation device |
US6497227B2 (en) | 2001-01-31 | 2002-12-24 | Cummins, Inc. | System for diagnosing fault conditions associated with an air handling system for an internal combustion engine |
JP4396581B2 (en) | 2005-06-02 | 2010-01-13 | 株式会社デンソー | EGR control device for internal combustion engine |
JP4487887B2 (en) | 2005-09-02 | 2010-06-23 | トヨタ自動車株式会社 | Valve control device for internal combustion engine |
CN101082318B (en) | 2006-05-31 | 2011-09-21 | 卡特彼勒公司 | Turbo-charger control system |
JP4655002B2 (en) | 2006-08-02 | 2011-03-23 | 株式会社デンソー | Control device for internal combustion engine |
EP2067956B1 (en) | 2007-12-04 | 2011-03-02 | Caterpillar Motoren GmbH & Co. KG | Exhaust gas waste gate system with charge pressure control |
US7757549B2 (en) | 2008-02-21 | 2010-07-20 | Cummins Ip, Inc | Apparatus, system, and method for predictive control of a turbocharger |
JP4730448B2 (en) | 2009-02-18 | 2011-07-20 | トヨタ自動車株式会社 | Control device for internal combustion engine |
US8347609B2 (en) | 2009-12-23 | 2013-01-08 | Ford Global Technologies, Llc | Methods and systems for emission system control |
-
2011
- 2011-11-21 US US13/300,941 patent/US8849548B2/en active Active
-
2012
- 2012-11-15 DE DE112012004837.7T patent/DE112012004837T5/en not_active Withdrawn
- 2012-11-15 CN CN201280057164.7A patent/CN103946513B/en not_active Expired - Fee Related
- 2012-11-15 WO PCT/US2012/065243 patent/WO2013078061A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7500363B2 (en) * | 2006-07-25 | 2009-03-10 | Honda Motor Co., Ltd. | Failure detecting device for supercharging-pressure control means in supercharging device of engine |
US7593828B2 (en) * | 2007-08-16 | 2009-09-22 | Gm Global Technology Operations, Inc. | Method and apparatus for monitoring a variable geometry intake air compressor device |
US8347625B2 (en) * | 2009-07-30 | 2013-01-08 | Robert Bosch Gmbh | Method and device for operating a wastegate actuator for a wastegate |
US20120210710A1 (en) * | 2011-02-21 | 2012-08-23 | Ford Global Technologies, Llc | Method for operating a turbocharger arrangement and control unit for a turbocharger arrangement |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9169796B2 (en) * | 2012-02-15 | 2015-10-27 | Ford Global Technologies, Llc | Method for operating an internal combustion engine with a turbocharger arrangement and control unit for an engine with a turbocharger arrangement |
US20130211693A1 (en) * | 2012-02-15 | 2013-08-15 | Ford Global Technologies, Llc | Method for operating an internal combustion engine with a turbocharger arrangement and control unit for an engine with a turbocharger arrangement |
US9309803B2 (en) * | 2013-12-05 | 2016-04-12 | GM Global Technology Operations LLC | Turbocharger compressor temperature control systems and methods |
US20150159544A1 (en) * | 2013-12-05 | 2015-06-11 | GM Global Technology Operations LLC | Turbo speed control for mode transitions in a dual turbo system |
US9303553B2 (en) * | 2013-12-05 | 2016-04-05 | GM Global Technology Operations LLC | Turbo speed control for mode transitions in a dual turbo system |
US20150159545A1 (en) * | 2013-12-05 | 2015-06-11 | GM Global Technology Operations LLC | Turbocharger compressor temperature control systems and methods |
DE102015105296B4 (en) | 2014-04-24 | 2018-05-09 | Toyota Jidosha Kabushiki Kaisha | Control device for an internal combustion engine |
US20160090926A1 (en) * | 2014-09-30 | 2016-03-31 | Toyota Jidosha Kabushiki Kaisha | Supercharging system |
US10267245B2 (en) * | 2014-09-30 | 2019-04-23 | Toyota Jidosha Kabushiki Kaisha | Supercharging system |
US9546591B2 (en) | 2014-11-26 | 2017-01-17 | Caterpillar Inc. | Exhaust system with exhaust gas recirculation and multiple turbochargers, and method for operating same |
CN111911303A (en) * | 2019-05-07 | 2020-11-10 | 丰田自动车株式会社 | Vehicle with a steering wheel |
JP2020183717A (en) * | 2019-05-07 | 2020-11-12 | トヨタ自動車株式会社 | vehicle |
JP7243420B2 (en) | 2019-05-07 | 2023-03-22 | トヨタ自動車株式会社 | vehicle |
Also Published As
Publication number | Publication date |
---|---|
CN103946513A (en) | 2014-07-23 |
DE112012004837T5 (en) | 2014-09-04 |
CN103946513B (en) | 2016-11-09 |
US8849548B2 (en) | 2014-09-30 |
WO2013078061A1 (en) | 2013-05-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8849548B2 (en) | Anti-sticking and diagnostic strategy for exhaust system valves | |
EP2489851B1 (en) | Method for operating a turbocharger arrangement and control unit for a turbocharger arrangement | |
EP2489850B1 (en) | Method for operating a turbocharger arrangement and control unit for a turbocharger arrangement | |
JP4883221B2 (en) | Control valve abnormality determination device for internal combustion engine | |
JP3818118B2 (en) | Fault diagnosis device for variable capacity turbocharger | |
US10006384B2 (en) | Control device for internal combustion engine | |
RU2711433C2 (en) | Method (embodiments) and system for engine | |
RU2711575C2 (en) | Method (embodiments) and compressor recirculation valve defect detection system | |
US8813493B2 (en) | Supercharger control device for an internal combustion engine | |
US9464586B2 (en) | Exhaust gas recirculation system of engine | |
EP2963263A1 (en) | Control device for internal combustion engine | |
WO2012086002A1 (en) | Control device for internal combustion engine equipped with supercharger | |
US20130008417A1 (en) | Control system for engine with exhaust gas recirculation | |
US9080502B2 (en) | Engine with variable valve mechanism | |
JP2008240576A (en) | Failure diagnosis device for turbocharging system | |
JP2013096372A (en) | Control device of internal combustion engine with supercharger | |
WO2012157108A1 (en) | Internal combustion engine control apparatus | |
JP2015010497A (en) | Diesel engine and control method for the same | |
JP2010229901A (en) | Control apparatus of internal combustion engine with superchargers | |
JP2010209748A (en) | Malfunction detecting device for supercharging system | |
JP5930288B2 (en) | Internal combustion engine | |
JP5843543B2 (en) | Control device for internal combustion engine | |
JP5570317B2 (en) | Control method for internal combustion engine | |
JP4638842B2 (en) | Control method for internal combustion engine with supercharger and internal combustion engine with supercharger | |
JP6065850B2 (en) | Supercharging diagnosis device for supercharged engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CATERPILLAR INC., ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LUFT, AARON CONRAD;STREUTKER, DANIEL;SANKAR, RAMMOHAN;AND OTHERS;SIGNING DATES FROM 20111027 TO 20111116;REEL/FRAME:027257/0806 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551) Year of fee payment: 4 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |